Attachment for telephones



(ModeL) f 3.Sheets-Sheet 1.

' J. O. CHAMBERS.

ATTACHMENT FOR TELEPHONBS.

No. 258,989. Patented June 6, i882.

(ModeL) 3 Sheets-Sheet 2.

J. :0. CHAMBERS. ATTACHMENT FOR TBLBPHONBS. No. 258,989. Y Patented June6-, 1882.

R5. Phnmlmw nplm. Wnmngton, D4 :1

(Modelj) 3 Sheets-Sheet 3.

- J. G. CHAMBERS.

I V ATTAGHMENT FOR TBLEPBONBS. I No. 258,989. I Patented June 6, 1882.

"PATENT OFFICE.

JOSEPHUS O. CHAMBERS, OF CINCINNATI, OHIO.

ATTACHM ENT FOR TELEPHONES.

SPECIFICATION formingpart of Letters Patent No. 258,989, dated June 6,1882.

Application filed August 25, 1881. (Modem To all whom it may concern Beit known that I, JosEPHUs O. CHAM- BERS, of Cincinnati, Hamilton county,Ohio, have invented a new and useful Attachment for Telephones, of whichthe following is a specification.

My invention relates to a provision to be attac-hed to the auditory orreceiving tube of a telephone for enabling the user to close the unusedear against external sounds.

My device consists essentially of a spring which, extending from thereceiving tube around to the other ear, terminates in a padded knob orbutton Whose pressure against the tragus or ear-valve closes theauditory canal and shuts out all interfering sounds.

In the accompanying drawings, Figure 1 shows a telephone provided withmy attachment and the manner of its use. Fig. 2 is a side elevation ofthe same to a larger scale. Fig. 3 is an edge view ofthe attachment.Fig. 4 represents a form of my improvement adapted for use on a stand ortable. Fig. 5 represents a modification of my attachment.

A may represent a Bell telephone tube of the customary form.

B is a hinged clamp, adapted to be fastened to such tube by means of aset-serew,0. From clamp B projects a C-spring, D, which terminates in apad. E. applied to the-users ear in the usual way, the spring-pad E ispressed against the tragus or ear-valve, so as to close. the auditorycanal, and thus exclude all interfering noise.

In addition to the above essential features of my invention Isometimes-secure the spring to the clamp by a hinge, F, and provide uponthe spring a rectangular lip or projection, G, that has a screw-threadedorifice which receives a set-screw, H,'hy which the distance of the padfrom the mouth of the telephone may be decreased or increased, so as tosecure the proper pressure upon the ear.

To the above features I also sometimes add The telephone being,

a stand, I, having a slidable shaft, J, capable of'being fixed at anyheight by means ofaset-screw, K, and having a hinged attachment, L, to ahead, M, which is further hinged at right angles to hinge L by hinge Nto the clamp before spoken of. This arrangement enables the instrumentto be fixed at any desired height and angular presentation.

Another modification consists in forming the spring-connection of asingle piece of spring-wire, D, Fig. 5, one end of which is bent inward,as at d, and has attached to it a soft pad or cushion, E, Fig. 5. Theother end of the said wire is so bent in several convolutions, at, asrepresented,'as to adapt it to be readily opened to engage around thetelephone tube and to possess suflijcient resilience to grasp the tube.Other convolutions, d", at the mid-length of the spring secure asufficiently-permanent resilience, which can be rendered more'or lesseffective by forcibly bending the wire out or in.

Having thus described my invention, what I claim as new therein,anddesire to secure by Letters Patent, is 1 1. A telephone attachmentconsisting of a bent spring having means at one end adapting it to besecured toa telephone-tube and bearingat the other end a pad which, whenthe attachment is in position, closesthe unused ear, for the purpose setforth.

2. The telephone-tube attachment consisting of a bent spring having atone end a pad for closing the unused ear and at-the othera device forattaching itto the telephone-tube, and a set-screw for modulating thepad pressure, as set forth.

In testimony of which invention I hereunto set my hand.

JOSEPHUS o. CHAMBERS.

Attest:

SAML. S. CARPENTER, PEROIVAL KNIGHT.

